package rabbitmq.simple;

import com.rabbitmq.client.*;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

public class ConsumerDemo {
    public static void main(String[] args) throws IOException, TimeoutException {
        // 1. 创建连接
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost("47.95.166.193");
        connectionFactory.setPort(5672);
        connectionFactory.setUsername("study");
        connectionFactory.setPassword("study");
        connectionFactory.setVirtualHost("Test");
        Connection connection = connectionFactory.newConnection();

        // 2. 创建 channel
        Channel channel = connection.createChannel();

        // 3. 声明队列（可以省略）
        channel.queueDeclare("Test", true, false, false, null);

        // 4. 消费消息
        /**
         * basicConsume(String name, boolean autoAck, Consumer callback)
         * 参数说明：
         * queue: d队列名称
         * autoAck: 是否自动确认
         * callback: 接收到消息后，所要执行的逻辑
         */
        DefaultConsumer consumer = new DefaultConsumer(channel) {
            // 从队列中收到消息，就会执行的方法
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                System.out.println("接收到消息：" + new String(body));
            }
        };
        channel.basicConsume("Test", true, consumer);

        // 5. 释放资源
        channel.close();
        connection.close();
    }
}
